Window



T Patented Sept-20, 1921.-

UNITED STATES PATENT" orrlcs.

JACK WILLIAMS, OF CHESTER, ENGLAND, ASSIGNOR TO WILLIAMS WILLIAMS LIM- ITED, OF CHESTER, ENGLAND, A COMPANY OF GREAT BRITAIN.

I WINDOW.

Application filed December 4, 1926, Serial No. 152,651, and in Great Britain March 8, 1926.

This invention relates to Windows of the kind comprising a lower sash mounted to hinge or pivot about the bottom member of the window frame or sill and an upper sash i) mounted in a frame and so connected to the lower sash by links pivoted between their ends to the side members of the frame that when one sash moves theother moves to a corresponding extent. 7

.A window according to this invention comprises alower sash hinged at its lower end to the window frame or sill, an upper sash mounted in the frame upon sliding pivots and one or more links pivoted at a point between their ends to the side members of the frame and connected at their ends to the sashes. The connecting links are attached to the lower sash by means of sliding pivots and to the upper sash by means .of simple 2 stationary pivots. p Preferably the sliding pivots comprise blocks adapted'to slide in grooves or channels formed in the sash frames and in the 7 case of metal windows these grooves are'conveniently provided by employing frame members of a suitable channel section.

The invention'may be carried out in various ways but one construction according thereto is illustrated diagrammatically by way of example in the accompanying drawing, in which the window is shown in side elevation.

In the construction illustrated in the draw ing, the window comprises two metal sashes A and B and a metal frame C all formed of suitable channel section. The lower sash A is'hinged to "the frame at its lower end and the upper corners of the upper sash are pivoted to blocks C mounted to slide in the 40 channels in the side members of the metal frame C. LinksD centrally pivoted to the frame connect the two sashes'A and B at each side. The upper ends of the links 1) are pivoted to the upper sashB- at D and their lower ends are pivoted at D to sliding blocks A mounted to slide in grooves conveniently provided by the channel section side members of the lower sash A. When the window is shut-both sashes lie in the same plane, the blocks C being at the top of the channels in the frame and the blocks A at the bottom of the channels in the sash. To open the window the lower sash A is swung inwards on its hinges. This causes the links D to turn about their centralpivots so as to swing the upper sash B outwards on its pivot, the blocks A and C sliding in their respective channels to permit of.

this movement. Thus anymovement of the lower sash A causes a simultaneous corresponding movement of the upper sash B.

It will be understood that instead of being actually hinged or pivoted to the window frame, the lowermost sash may rest on the bottom rail of the frame so as to turn or rock thereon when the window is opened without forming a gap in so doing.

With a window in accordance with this.

invention, as there is no gap or opening between the sill and the bottom rail of the sash when the window is open, draught excluding wings of the known type can be used for the bottom sash if desired.

What I claim as my invention and desire to secure by Letters Patent is 1. In a sash window the combination of frame, a lower sash hinged at its lower end to the said frame, an upper sash,pivots on which the upper sash is mounted to slide in the frame, and links pivoted at a point between their ends to the side members of the frame and connected at their ends to the sashes.

2. In a sash window the combination of a frame, a lower sash hinged at its lower end to the said frame, an upper sash, blocks to which the upper sash is pivoted, the said blocks being mounted to slide in channels formed infth'e side members of thewindow .frame, links pivoted at a point between their ends to the side members of the frame and at their upper ends to the upper sash, and blocks mounted to slide in channels formed in the side members of the lower sash frame, the lower ends of the links being pivoted to the said blocks. I

3. In a sash window'the combination of a frame, a lower sash hinged at its lower end to the said frame, an upper sash, blocks to which the upper sash is pivoted at its up per end, the said iiiUUkS being mounted to elide in LiliHlHL'iS formed in the side 1nen1- here of the window frame, links pivoted at a point between their! ends to the side members of Hie window Innne and :it their upper ends to the upper sash, and blocks mountd to slide in channels formed in the side members of the lower sash fl'znne, the lower ends of 10 [he links being pivoted to the said blocks.

in teetinlony whereol. I. inwe signed my THHIIG to (his HIWLH'IUZLUOII.

JACK \VILLIAD'IS. 

